Electric lantern



L. D. BRAINERD.

ELECTRIC LANTERN. APPLICATION FILED DEC. 31, 19.!9.

1,380,091 Patented May 31, 1921.

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LEIGH D. BRAINER-D, OF CHICAGO, ILLINOIS.

ELECTRIC LANTERN.

Specification of Letters Patent.

Patented May 31, 1921.

Application filed December 31, 1919. Serial No. 348,707.

T 0 all whom it may concern:

Be it known that I, LEIGH D. BRAINERD, a citizen of the United States,residing in the city of Chicago, in the county of Cook and State ofIllinois, have invented certain new rent from the batteries is passedthrough the bulbs.

One object of my said invention, is to provide a lantern of this classwhich will be simple in construction and operation, low in cost, anddurable in use.

Another object is to provide a lantern of this class which may be usedinterchangeably in printing and developing films, prints, or negativesin the photographic dark room, or for general illumination in the houseor out of doors.

Another object is to provide a lantern of the class described, in whichthe color of the light may be easily and quickly changed from red, ruby,orange or other color to clear and the reverse, as desired in use.

Another object is to provide a lantern of this class in which thecurrent will be broken automatically whenever the lantern is placed atrest out of use, and one in which by means of double reflectors thelight is reflected both forward and downward toward the table, floor orground, and away from the eyes of the operator.

Other objects of my said invention are more particularly set forth inthe accompanying specification, and will be apparent from the followingdescription and accompanying drawings:

In the accompanying drawings, in which like numerals of reference referto similar parts throughout the various views,

Figure 1 is a side elevation of my said invention, with portions of theouter casing broken away to show interior parts.

Fig. 2 is a top plan view, with portions of the cover broken away toshow the parts within.

Fig. 3 is a detail view of the glass interchangeable opening, and theslideway for insertion and retention of said glass.

Referring now more particularly to the accompanying drawings, thenumeral 1 designates the case or container which I employ to house mybattery and light bulb.

This case is substantially rectangular in cross section, and may bemade, of sheet metal or other suitable material, and of a size suited tocontain one or more of the commercial dry cell batteries now offered forsale on the market. At the upper front side of said case, I haveprovided an in closed chamber 2, within which I have placed the electriclight bulb 3. The upper wall of said chamber 4 is preferably polished toform a reflector, and the rearward wall 5 of said chamber is alsopreferably polished to form a reflector. At the front of said chamber Ihave provided a glass plate, as 6 mounted to slide in grooves in thecase as at 21 and 22 Fig. 3, to provide ready and convenient means toremove said glass and insert others in its place when de sired, tochange the color of the light from said lantern.

For convenience in inserting and supporting the electric light bulb 3, Ihave provided a suitable socket 7, mounted in the rear wall of thechamber as shown, with its screw socket in electric conducting contactwith said wall 5 for a purpose hereinafter explained. I

WVithin my case 1 I have placcd the dry cell battery 8, which may be ofany usual style, and which has the terminal 9 at its central portion,and the terminal 10 at its peri )hery, as is customary in suchbatteries. ounted upon the central terminal 9 of said battery, I haveemployed the L shaped member or bracket 20, which has a slot at one endsuitable for straddling the screw of the contact terminal 8, and is heldagainst displacement by the binding nut 11 usually employed upon batteryterminals. At the end of said bracket toward the light chamber, I haveprovided the screw 12 passing through said bracket, and held in positionby the nut 13. This screw 12 is disposed in line with the centralterminal of the electric light bulb 3, and is adjusted to contact withsaid central terminal whenever the bulb is screwed into the socket 7,and is designed to form an electric circuit between the said centralterminal of the light bulb, and the battery, through the screw 12, thebracket 20 and the battery terminal 9.

On the side of the case adjacent the second terminal of the battery 10,I have mounted the spring contact arm 23. with its free of said case 1,in proximity toxthe battery terminal 10. This spring contact arm is heldnormally out of contact with the battery terminal 10, until forcedinward into contact therewith either by thehfind of the operator, or bythe handle as hereinafter described. When said spring contact arm is soforced into contact with said battery terminal 10, it completes theelectric circuit through the battery and the light bulb, by means of thespring contact arm, and the wall of the case 1, and the wall 5 of thelight chamber, the lamp socket, and the terminal of the light bulbconnected to the screw stem of said bulb.

For convenience in carrying and operating said lantern, I have provideda handle 16, pivoted on opposite sides of said case 1 as at 19 19. Thishandle is so positioned with reference to the spring contact arm 23,that whenever the handle is raised as in the position shown in thedotted lines, it will contactwith said arm, andv force it inward intocontact with the battery terminal 10, thereby completing the electriccircuit, and causing the light bulb to glow. Whenever it is desired toextinguish said light, the handle is lowered out of contact with saidspring 23, and the spring 23 returns to itsnormal position out ofengagement with the battery terminal 10, breaking the electric circuit.

l have made the cover 17 with the edge 18 turned downward, to provide alighttight joint when the cover is placed in position on the top ofthecase, and at the same time it is easily removable to change the glass,or battery, or to inspect the parts within said case whenever required.

In operation, a suitable battery is inserts ed in-the case and thecentral binding post connected with the bracket 20. -A suitable electriclight bulb is screwed into the socket in the light chamber, and thelantern is ready for use. For dark room photographid development, a red,ruby or orange colored glass may be inserted in the front, and thelantern will throw the light downward upon the negative or film beingdeveloped. When .it is desired to expose a print or film or lanternslide in printing, the glass may be removed, and the light used for thepurpose of the exposure, and when the exposure is completed, the glassmay be replaced, and the same lantern employed during its development.

rseopei For house use, the 'lantern'may be carried by the handle, placedupon the table, stand, or other support, or may be suspended by thehandle. In outdoor use, the lantern is usually carried by the handle, ormay be carried in the hand. lit will be seen that by my specialconstruction, the light is always reflected forward and downward, andthe roof, or cover of the lantern,

. light bulb mounted in said light chamber,

one terminal in electric contact with the rear reflector, a removablebattery within said casing, the central terminal connected with theremaining terminal of the bulb, a spring contact shoe mounted on theeasing for contacting with the second terminal of the battery, a coverwith downwardprojecting edges for inclosing the said casing, allsubstantially as shown and described.

2. In a device of the class described, the combination of a rectangularcasing having an inclosed light chamber therein, a

handle pivotally attached to said casing, a

removable battery disposedwithin said casing, a cover with downwardprojecting edges for inclosing said casing, upper and rear reflectors inthe light chamber, an opening in the forwardwall of the light chamberhaving grooved way for receiving andretaining a plate of glass, anelectric light bulb within said chamber mounted with one terminal inelectric contact with the casing, the other terminal being connected tothe central batteryterminal by an IL shaped bracket, a spring contactshoe mounted on the casing adjacent the other battery terminal anddisposed within the path of the handle, all substantially as shown anddescribed.

In witness whereof, l have hereunto affixed my signature in the presenceof two

